77212616 has 32 divisors (see below), whose sum is σ = 161292600. Its totient is φ = 34406400.

The previous prime is 77212613. The next prime is 77212631. The reversal of 77212616 is 61621277.

It can be written as a sum of positive squares in 4 ways, for example, as 74476900 + 2735716 = 8630^2 + 1654^2 .

It is not an unprimeable number, because it can be changed into a prime (77212613) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9785 + ... + 15816.

Almost surely, 2^77212616 is an apocalyptic number.

It is an amenable number.

77212616 is an abundant number, since it is smaller than the sum of its proper divisors (84079984).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

77212616 is a wasteful number, since it uses less digits than its factorization.

77212616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25649 (or 25645 counting only the distinct ones).

The product of its digits is 7056, while the sum is 32.

The square root of 77212616 is about 8787.0709568092. The cubic root of 77212616 is about 425.8233009748.

The spelling of 77212616 in words is "seventy-seven million, two hundred twelve thousand, six hundred sixteen".